But thinking out loud....knowing that how we poo is a look into how our gut environment/digestion process is health wise....and since there are 2 Paleo facts that:
A) Toilet paper does not grow on trees
B) There are no natural porcelain toilets growing in the fields

Would reason to believe that a healthy human was meant to litteraly "dump and run".....with no need of wipping (unlike what we all think when we go camping and grab some leaves) and only need to crouch down for a brief time (again unlike what we think as most of us call the bathroom the "library").

So in a sense if you are eating right, and are healthy in the gut...you should not have to stay in the bathroom for 15minutes and really should have a clean "wipe" after. Anything else means you have issues or are eating the wrong foods for your system......just a guess....feel free to comment in any detail you want...it's all scientific...except for anything Ron says....

The problem is in the walking on two legs thing. We developed butt cheeks and the anus is now back in instead of outside so to speak like on 4 legged animals. Instead of drying out and falling off the way other animals do, it can just kind of smear itself around between your cheeks if not cleaned - causing some problems. I know many cultures do not "wipe" but many "wash". No diet is perfect enough that occasional problems would not occur.